[pgn][Event "2.p Breyer MT Magyar Sakkélet#0776"]
[Site "?"]
[Date "1968.??.??"]
[Round "?"]
[White "Kasparyan=G"]
[Black "(=3012.32e3d6)"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "5N2/6N1/q2k3p/8/6p1/4K1PP/B5P1/8 w - - 0 1"]
[PlyCount "18"]
[EventDate "1968.??.??"]
1. Nf5+ Ke5 2. Nd7+ Kxf5 3. Bb1+ Kg5 4. h4+ Kh5 5. Kf2 Qa7+ 6. Kf1 Qa1 7. Nf6+
Qxf6+ 8. Kg1 Qb6+ 9. Kh2 Qxb1 1/2-1/2
[/pgn]
Behting study equivalent ⁉
Complex Puzzle
Moderators: hgm, Rebel, chrisw
-
Nordlandia
- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
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peter
- Posts: 3186
- Joined: Sat Feb 16, 2008 7:38 am
- Full name: Peter Martan
Re: Complex Puzzle (first is draw)
Sting is able to keep right eval in hash after Backward:Nordlandia wrote:This one is tricky indeed
rn6/1b1p4/p1pP1K2/2P4k/P7/5P1P/1P6/8 w - - 0 1
Analysis by Sting SF 6.7 64bit:
1.a5 Kh4 2.f4 Ra7 3.Ke5 Ba8 4.Kd4 Rb7 5.Kc3 Kh5 6.b4 Ra7 7.Kd4 Kg6 8.h4 Bb7 9.Kd3 Kh5 10.f5 Ra8 11.Kd4 Bc8 12.Ke5 Kh6 13.Kd4 Kh5
= (0.00) Depth: 50 00:00:35 418MN
So does this SF without nullmove- pruning:
rn6/1b1p4/p1pP1K2/P1P4k/8/5P1P/1P6/8 b - - 0 1
Analysis by SF 171114IPx 64 POPCNTe:
1...Kh4 2.f4 Bc8 3.Ke5 Kh5 4.b4 Kg6 5.h4 Kh5 6.f5 Kh6 7.Kd4 Kg7 8.h5 Kh6 9.f6 Ra7 10.Kd3 Bb7 11.Kc4 Bc8 12.Kd4 Kh7 13.Kc3 Kg8 14.h6 Rb7 15.Kc4 Ra7 16.Kb3 Bb7 17.Kc4 Ba8 18.Kb3 Bb7
= (0.00) Depth: 42/36 00:00:17 267MN
Last edited by peter on Tue Apr 26, 2016 9:19 pm, edited 1 time in total.
Peter.
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Nordlandia
- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Re: Complex Puzzle (first is draw)
Genrikh Kasparyan, 1959 Tidsskrift for schack
[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "kb2B3/2p5/8/1PN5/8/8/p3K3/8 b - - 0 1"]
[PlyCount "6"]
1... a1=Q 2. Bc6+ Ka7 3. Kd3 Kb6 4. Nb3 $1 $11 (4. Nd7+ $4 Ka5 5. Nxb8 Qa4 6.
Nd7 Qb4 7. Ke3 Qh4 8. Ne5 Kb4 9. Nf3 Qg3 10. Kd3 Qh3 11. Ke3 Qf5 12. Nd2 Qe5+
13. Kd3 Qc3+ 14. Ke2 Qg3 15. Ne4 Qh3 16. Nd2 Kc3 17. Nf3 Qh5 18. Kf2 Qg6 19.
Ke2 Qf6 20. Ke3 Qf5 21. Ke2 Qc5 22. Nd2 Qe5+ 23. Ne4+ Kd4 24. Kf3 Qf5+ 25. Ke2
Qf4 26. Nf2 Qe3+ 27. Kf1 Qe6 28. Nd1 Kd3 29. Nf2+ Ke3 30. Nd1+ Kd2 31. Nf2 Qg6
32. Bf3 Ke3 33. Ng4+ Kf4 34. Bd1 Kg3 35. Nf2 Qf6 36. Ke2 Qxf2+ 37. Kd3 Qb2 38.
b6 cxb6 39. Bc2 Kf4 40. Bd1 Qa3+ 41. Kd2 Qe3+ 42. Kc2 Ke4 43. Bf3+ Qxf3 44. Kb2
b5 45. Ka2 Kd4 46. Kb2 Qd1 47. Ka2 Kc3 48. Ka3 Qa1# {Lomonosov Tablebases}) *
[/pgn]
[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "kb2B3/2p5/8/1PN5/8/8/p3K3/8 b - - 0 1"]
[PlyCount "6"]
1... a1=Q 2. Bc6+ Ka7 3. Kd3 Kb6 4. Nb3 $1 $11 (4. Nd7+ $4 Ka5 5. Nxb8 Qa4 6.
Nd7 Qb4 7. Ke3 Qh4 8. Ne5 Kb4 9. Nf3 Qg3 10. Kd3 Qh3 11. Ke3 Qf5 12. Nd2 Qe5+
13. Kd3 Qc3+ 14. Ke2 Qg3 15. Ne4 Qh3 16. Nd2 Kc3 17. Nf3 Qh5 18. Kf2 Qg6 19.
Ke2 Qf6 20. Ke3 Qf5 21. Ke2 Qc5 22. Nd2 Qe5+ 23. Ne4+ Kd4 24. Kf3 Qf5+ 25. Ke2
Qf4 26. Nf2 Qe3+ 27. Kf1 Qe6 28. Nd1 Kd3 29. Nf2+ Ke3 30. Nd1+ Kd2 31. Nf2 Qg6
32. Bf3 Ke3 33. Ng4+ Kf4 34. Bd1 Kg3 35. Nf2 Qf6 36. Ke2 Qxf2+ 37. Kd3 Qb2 38.
b6 cxb6 39. Bc2 Kf4 40. Bd1 Qa3+ 41. Kd2 Qe3+ 42. Kc2 Ke4 43. Bf3+ Qxf3 44. Kb2
b5 45. Ka2 Kd4 46. Kb2 Qd1 47. Ka2 Kc3 48. Ka3 Qa1# {Lomonosov Tablebases}) *
[/pgn]
-
peter
- Posts: 3186
- Joined: Sat Feb 16, 2008 7:38 am
- Full name: Peter Martan
Re: Complex Puzzle (first is draw)
Again you have to "show" some more moves avoiding the stalemate of the author's solution- line by Forward- Backward to the engine to make it "see" the positional draw and keep the right eval in hash:
5N2/6N1/q2k3p/8/6p1/4K1PP/B5P1/8 w - - 0 1
Analysis by Stockfish 240416 64 POPCNT:
1.Nf5+ Ke5 2.Nd7+ Kxf5 3.Bb1+ Kg5 4.h4+ Kh5 5.Kf2 Qa1 6.Nf6+ Qxf6+ 7.Kg1 Qa1 8.Kh2 Qd4 9.Bf5 Qf6 10.Bh7 Qg7 11.Bb1 Qd4
= (0.00) Depth: 41/23 00:00:13 339MN
5N2/6N1/q2k3p/8/6p1/4K1PP/B5P1/8 w - - 0 1
Analysis by Stockfish 240416 64 POPCNT:
1.Nf5+ Ke5 2.Nd7+ Kxf5 3.Bb1+ Kg5 4.h4+ Kh5 5.Kf2 Qa1 6.Nf6+ Qxf6+ 7.Kg1 Qa1 8.Kh2 Qd4 9.Bf5 Qf6 10.Bh7 Qg7 11.Bb1 Qd4
= (0.00) Depth: 41/23 00:00:13 339MN
Peter.
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Nordlandia
- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Re: Complex Puzzle (first is draw)
No. 1177 Y. Zemlyansky
2nd Prize, '64', 1967
Award xii.68 6
[d]3B4/3P1P2/4p3/p6B/k2q4/P3pP2/1pP5/1K6 w - - 0 0
2nd Prize, '64', 1967
Award xii.68 6
[d]3B4/3P1P2/4p3/p6B/k2q4/P3pP2/1pP5/1K6 w - - 0 0
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Nordlandia
- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Re: Complex Puzzle (first is draw)
No. 7929 D. Probst (xii.87)
Commended, SSZ, 1987-88
White wins!
[d]8/8/5Qpp/3q1bpk/4Nn1p/7B/3NnPP1/7K w - - 0 0
E. Melnichenko (xii.87)
Commended, SSZ, 1987-88
White draws!
[d]8/r6r/R1R5/1k6/1ppppppp/8/PPPPPPP1/1nn3KN w - - 0 0
Commended, SSZ, 1987-88
White wins!
[d]8/8/5Qpp/3q1bpk/4Nn1p/7B/3NnPP1/7K w - - 0 0
E. Melnichenko (xii.87)
Commended, SSZ, 1987-88
White draws!
[d]8/r6r/R1R5/1k6/1ppppppp/8/PPPPPPP1/1nn3KN w - - 0 0
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Nordlandia
- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Re: Complex Puzzle (first is draw)
No. 8056 I. Bondar
Comm., Chess and Draughts
in the BSSR, 1984-85
Black to Move, White Wins!
[d]8/8/P1p5/3k4/3b3B/p4K2/2B5/8 b - - 0 1
No. 8107 A. Malyshev(ii.88)
6 Hon.Mention, 64-Sh.Ob., 1988
Author claims white draw, although black is ahead +1.5 according last SF Dev. It other words the study is probably unsound.
[d]8/4bk2/5N2/KB6/P3N3/8/1n4b1/1n6 w - - 0 1
Comm., Chess and Draughts
in the BSSR, 1984-85
Black to Move, White Wins!
[d]8/8/P1p5/3k4/3b3B/p4K2/2B5/8 b - - 0 1
No. 8107 A. Malyshev(ii.88)
6 Hon.Mention, 64-Sh.Ob., 1988
Author claims white draw, although black is ahead +1.5 according last SF Dev. It other words the study is probably unsound.
[d]8/4bk2/5N2/KB6/P3N3/8/1n4b1/1n6 w - - 0 1
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Nordlandia
- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Re: Complex Puzzle (first is draw)
No. 8266 V. Yakovenko
2nd Comm., I.A.Kan Memorial, 1991
Can white win this?
[d]8/4K3/bb6/4pk2/2P2N2/8/6BB/8 w - - 0 0
2nd Comm., I.A.Kan Memorial, 1991
Can white win this?
[d]8/4K3/bb6/4pk2/2P2N2/8/6BB/8 w - - 0 0
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zullil
- Posts: 6442
- Joined: Tue Jan 09, 2007 12:31 am
- Location: PA USA
- Full name: Louis Zulli
Re: Complex Puzzle (first is draw)
If so, Stockfish cannot see it:Nordlandia wrote:No. 8266 V. Yakovenko
2nd Comm., I.A.Kan Memorial, 1991
Can white win this?
[d]8/4K3/bb6/4pk2/2P2N2/8/6BB/8 w - - 0 0
Code: Select all
info depth 66 seldepth 96 multipv 1 score cp 52 nodes 1543026656598 nps 44114604 hashfull 999 tbhits 37587374574 time 34977683 pv g2h3 f5e4 f4d5 b6c5 e7d7 a6c4 d5f6 e4d3 h3f5 d3e2 h2e5 c4d3 f5h3 e2f3 d7c6 c5e7 f6e8 d3e4 c6d7 e7g5 e5b2 e4d3 e8d6 g5f4 d6f7 d3b5 d7e7 b5c4 f7h8 c4b3 h8g6 f4g5 e7e8 g5f4 h3f5 b3d5 f5c2 d5e4 c2d1 f3g3 g6h8 e4d5 e8d7 d5f3 d1b3 f3g4 d7c6 g4f3 c6b5 f3h5 b5c4 f4e3 b2e5 e3f4 e5g7 g3g4 b3c2 h5e8 c4c5 g4g5 g7c3 f4e3 c5d6 g5f4 c2d3 f4f3 d6e7 e8h5 d3c2 f3f4 e7e6 f4g5 e6d5 g5f4 c3f6 e3b6 d5c4 b6c7 c4d4 c7b6 d4d5 b6e3 f6e5 f4g5
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Nordlandia
- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Re: Complex Puzzle (first is draw)
However 1. Qxa4 and white is ahead +1 according last stockfish dev. Study is probable unsound.
[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "7q/1Nn1rbnN/P1Q5/4r3/p5k1/P2pB1P1/3P2RK/8 w - - 0 1"]
[PlyCount "1"]
1. Qxa4+ $36 *
[/pgn]
Code: Select all
7q/1Nn1rbnN/P1Q5/4r3/p5k1/P2pB1P1/3P2RK/8 w - - 0 1[d]3B4/5B2/8/5b2/8/6P1/K3k3/6bN w - - 0 0